FOC_25_Epidendroidea..

2. Rhynchostylis gigantea (Lindley) Ridley, J. Linn. Soc., Bot.
32: 356. 1896.
海南钻喙兰 hai nan zuan hui lan
Saccolabium giganteum Lindley, Gen. Sp. Orchid. Pl. 221.
1833; Anota densiflora (Lindley) Schlechter; A. gigantea (Lindley)
Fukuyama; A. hainanensis (Rolfe) Schlechter; Gastrochilus
giganteus (Lindley) Kuntze; Vanda densiflora Lindley; V.
hainanensis Rolfe.
Stems erect, 4–13 cm or longer, stout, ca. 2 cm in diam.,
many leaved. Leaves broadly lorate, 20–40 cm, fleshy, with amplexicaul
sheaths at base, apex obtuse and unequally bilobed.
Inflorescences 2–4, usually arching, 14–30 cm, densely many
flowered; rachis 10–20 cm, thick; floral bracts often reflexed,
EPIDENDROIDEAE
475
broadly ovate, ca. 5 mm. Flowers thickly textured, white spotted
with purplish red, lip deep purplish red, column purplish
red, anther cap white. Sepals similar, elliptic-oblong, 12–17 ×
9–10 mm, obtuse. Petals oblong, smaller than sepals, base contracted,
apex obtuse; lip subobovate, ca. 17 × 12 mm, fleshy,
base with a pair of ridges, margin 3-lobed; lateral lobes erect,
subelliptic; mid-lobe very small, retuse; disk slightly papillate;
spur narrowly conic, ca. 5 mm, inside densely white hairy. Column
ca. 4 mm, thick, foot very short or indistinct; rostellum
suborbicular; stipe linear, ca. 2 mm, apex ± dilated; viscidium
lanceolate. Capsule obovoid, ca. 4 cm. Fl. Jan–Apr, fr. Feb–
May. 2n = 38.
Epiphytic on tree trunks in open forests; ca. 1000 m. Hainan
[Cambodia, Indonesia, Laos, Malaysia, Myanmar, Singapore, Thailand,
Vietnam].
172. UNCIFERA Lindley, J. Proc. Linn. Soc., Bot. 3: 39. 1858.
叉喙兰属 cha hui lan shu
Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood
Herbs, epiphytic, monopodial. Roots not piercing leaf sheaths. Stems usually pendulous, elongate, slender, leafy. Leaves overlapping,
distichous, flat, oblong to lanceolate, slightly fleshy, base amplexicaul, sheathing, jointed, apex unequally bilobed or praemorse.
Inflorescence axillary, racemose, densely few to many flowered. Flowers thickly textured. Sepals and petals similar, concave;
lateral sepals slightly oblique. Petals slightly smaller than sepals; lip funnel-shaped, spurred, 3-lobed, lateral lobes suberect; mid-lobe
very small, fleshy, adaxially ± concave; spur long, hooked or curved, inside unornamented. Column terete, bent down over spur entrance,
footless; rostellum conspicuous, thick; anther cap conic, apex elongate and narrowed; pollinia waxy, 2, globose, deeply cleft,
separated by a hyaline flange, attached by a common long, linear stipe to a large viscidium; stipe wings borne on a ridge formed by
basal part of rostellum.
About six species: from tropical Himalayan regions to Indochina and Thailand; two species in China.
1a. Apex of spur strongly curved forward and hooked ................................................................................................... 1. U. acuminata
1b. Apex of spur curved backward toward ovary ........................................................................................................... 2. U. thailandica
1. Uncifera acuminata Lindley, J. Proc. Linn. Soc., Bot. 3: 40.
1858.
叉喙兰 cha hui lan
Saccolabium acuminatum (Lindley) J. D. Hooker.
Stems often arching, terete, 5–27 cm, slender, 3–4 mm in
diam., many noded, internodes 1–2 cm. Leaf blade lanceolate or
obliquely oblong, 4–10.5 × 0.7–1.5 cm, acute and slightly praemorse.
Inflorescence arching, 7–10 cm, densely many flowered;
floral bracts ovate, 3–6 mm. Flowers not opening widely, yellowish
green, slightly fleshy; pedicel and ovary 5–7 mm. Sepals
cymbiform, broadly ovate, 6–7 × ca. 5 mm, obtuse. Petals
ovate, ca. 6 × 4 mm, obtuse; lip with a long spur at base, 3lobed;
lateral lobes erect, suborbicular, large, 5–6 mm wide;
mid-lobe ovate-triangular, very small, fleshy, adaxially shallowly
concave, apex obtuse; spur funnel-shaped, strongly
curved forward and hooked, ca. 15 mm. Column ca. 3 mm;
rostellum large, fleshy; anther cap subconic; stipe ca. 3 mm;
viscidium oblong, ca. 3 mm. Fl. Apr–Jul.
Epiphytic on tree trunks in dense forests; 1300–1900 m. Guizhou,
S Yunnan [Bhutan, NE India, Nepal].
2. Uncifera thailandica Seidenfaden & Smitinand, Orchids
Thailand 4(2): 828. 1965.
中泰叉喙兰 zhong tai cha hui lan
Stems short, internodes ca. 10 mm. Leaf blade ligulate,
10–12 × ca. 2 cm, unequally obtusely bilobed. Inflorescence
gently curving; peduncle 4–6 cm; rachis 7–10 cm, many flowered.
Flowers: sepals light purple edged white, petals light
greenish with a purple central spot, lip white with a purple spot
near apex of blade; pedicel and ovary 9–10 mm. Dorsal sepal
concave, ca. 7 × 4.5 mm; lateral sepals ca. 7 × 5 mm. Petals ca.
6.3 × 5 mm; lip lateral lobes insignificant, triangular with broad
base, less than 1 mm high, ca. 1.5 mm wide at base; mid-lobe
very fat, with 2 small lobes turned backward; spur sigmoid, apex
turned backward toward ovary. Column very short, tip of rostellum
hidden in opening of sac.
Epiphytic in evergreen forests; ca. 1400 m. Yunnan (Yingjiang)
[Thailand].
173. ROBIQUETIA Gaudichaud, Voy. Uranie, Bot. 426. 1829.
寄树兰属 ji shu lan shu
Chen Xinqi (陈心启 Chen Sing-chi); Jeffrey J. Wood